globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2017.12.023
Scopus ID: 2-s2.0-79955823466
Evidence of former stishovite in UHP eclogite from the South Altyn Tagh, western China
Author: Liu L.; Zhang J.-F.; Cao Y.-T.; Green H.W.; II; Yang W.-Q.; Xu H.-J.; Liao X.-Y.; Kang L.
Source Publication: Earth and Planetary Science Letters
ISSN: 0012821X
Publishing Year: 2018
Volume: 484
pages begin: 353
pages end: 362
Language: 英语
Keyword: eclogite ; quartz paramorphs ; South Altyn ; stishovite ; ultra-deep subduction
Scopus Keyword: Garnets ; Metamorphic rocks ; Quartz ; Continental materials ; Eclogites ; Mineral composition ; Polycrystalline quartz ; South Altyn ; stishovite ; Ultra deeps ; Ultrahigh pressure ; Silica ; eclogite ; melt inclusion ; P-T conditions ; quartz ; stishovite ; subduction ; ultrahigh pressure metamorphism ; Altun Mountains ; China
English Abstract: We report here for the first time long prism/needle-shaped polycrystalline quartz aggregates and square/parallelogram-shaped single-phase quartz inclusions in omphacite and garnet of ultrahigh pressure (UHP) eclogite from the Yinggelisayi area in the South Altyn UHP belt. Based on their morphology and mineral composition, these quartz inclusions in omphacite and garnet are quartz paramorphs after stishovite. The minimum peak pressure of the eclogite is estimated to be >8–9 GPa at 800–1000 °C based on the stability field of stishovite. This new evidence, together with previous discovery of kyanite + spineal exsolutions in former stishovite of the pelitic gneiss from the same region, suggests a ultra-deep subduction and exhumation of the South Altyn continental rocks to/from mantle depths in the stability field of stishovite. Evidence of ultra-deep subduction of continental materials might be more common and diverse than previous thought. © 2017 Elsevier B.V.
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被引频次[WOS]:9   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Appears in Collections:影响、适应和脆弱性

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Affiliation: State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an, 710069, China; State Key Laboratory of GPMR, School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; College of Geological Science & Engineering, Shandong University of Science and Technology, Qingdao, 266510, China; Institute of Geophysics and Planetary Physics, Department of Earth Sciences, University of California, Riverside, CA 92521, United States

Recommended Citation:
Liu L.,Zhang J.-F.,Cao Y.-T.,et al. Evidence of former stishovite in UHP eclogite from the South Altyn Tagh, western China[J]. Earth and Planetary Science Letters,2018-01-01,484
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